 * {
     margin: 0;
     padding: 0;
     box-sizing: border-box;
     font-family: 'Microsoft YaHei', sans-serif;
 }

 body {
     overflow: hidden;
     background: linear-gradient(135deg, #0a0a2a, #1a1a4a, #0a0a2a);
     color: #fff;
     height: 100vh;
     perspective: 1000px;
 }

 canvas {
     position: fixed;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
     z-index: 0;
 }

 .container {
     position: relative;
     z-index: 10;
     width: 100%;
     height: 100vh;
     display: flex;
     flex-direction: column;
     justify-content: center;
     align-items: center;
     text-align: center;
     padding: 20px;
     overflow: hidden;
     cursor: pointer;
 }

 .main-title {
     font-size: 4.5rem;
     font-weight: 800;
     margin-bottom: 20px;
     text-shadow: 0 0 20px rgba(0, 150, 255, 0.7);
     letter-spacing: 2px;
     background: linear-gradient(to right, #4facfe, #00f2fe);
     -webkit-background-clip: text;
     -webkit-text-fill-color: transparent;
     animation: titleGlow 2s infinite alternate;
     transform: translateY(-50px);
     opacity: 0;
     animation: fadeInDown 1.2s forwards 0.5s;
 }

 .hint {
     font-size: 1.5rem;
     margin-bottom: 40px;
     text-shadow: 0 0 10px rgba(0, 200, 255, 0.8);
     color: #e0f7fa;
     max-width: 80%;
     line-height: 1.6;
     opacity: 0;
     animation: fadeIn 1.5s forwards 1s;
 }

 .countdown {
     font-size: 3.5rem;
     margin: 30px 0;
     color: #ff9800;
     text-shadow: 0 0 15px rgba(255, 152, 0, 0.7);
     opacity: 0;
     animation: fadeIn 1s forwards 1.8s;
 }

 .spaceship-container {
     position: relative;
     width: 300px;
     height: 300px;
     margin: 20px auto 50px;
     opacity: 0;
     animation: fadeIn 1s forwards 1.5s;
 }

 #spaceship {
     position: absolute;
     top: 50%;
     left: 50%;
     width: 100px;
     height: 150px;
     background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 150"><path d="M50,5 L65,40 L85,55 L75,145 L25,145 L15,55 L35,40 Z" fill="%2300bcd4"/><path d="M50,45 L60,70 L65,100 L60,130 L40,130 L35,100 L40,70 Z" fill="%23009688"/><circle cx="50" cy="25" r="8" fill="%23ff9800"/><rect x="40" y="140" width="20" height="5" fill="%23f44336"/></svg>') no-repeat center center;
     background-size: contain;
     transform: translate(-50%, -50%);
     transition: transform 0.3s ease;
     filter: drop-shadow(0 0 15px rgba(0, 188, 212, 0.8));
 }

 .stars-container {
     position: absolute;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
     pointer-events: none;
 }

 .star {
     position: absolute;
     background-color: white;
     border-radius: 50%;
 }

 .info-panel {
     position: fixed;
     top: 0;
     left: 0;
     width: 100%;
     height: 100%;
     background: rgba(10, 15, 30, 0.95);
     backdrop-filter: blur(10px);
     padding: 40px 20px;
     overflow-y: auto;
     z-index: 100;
     display: none;
     opacity: 0;
     transform: translateY(50px);
     transition: opacity 0.5s, transform 0.5s;
 }

 .info-panel.panel-show {
     display: block;
     opacity: 1;
     transform: translateY(0);
 }

 .close-btn {
     position: absolute;
     top: 20px;
     right: 20px;
     background: rgba(255, 255, 255, 0.1);
     border: none;
     color: white;
     font-size: 1.5rem;
     width: 50px;
     height: 50px;
     border-radius: 50%;
     cursor: pointer;
     transition: all 0.3s;
 }

 .close-btn:hover {
     background: rgba(255, 255, 255, 0.2);
     transform: rotate(90deg);
 }

 .panel-title {
     text-align: center;
     font-size: 2.5rem;
     margin-bottom: 30px;
     color: #4fc3f7;
     text-shadow: 0 0 10px rgba(79, 195, 247, 0.5);
 }

 .panel-content {
     display: flex;
     flex-wrap: wrap;
     max-width: 1200px;
     margin: 0 auto;
     gap: 20px;
     justify-content: center;
 }

 .panel-left,
 .panel-right {
     flex: 1;
     min-width: 300px;
 }

 .info-item {
     background: rgba(25, 35, 65, 0.7);
     border-radius: 15px;
     padding: 20px;
     margin-bottom: 20px;
     box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
     border: 1px solid rgba(79, 195, 247, 0.3);
     transition: transform 0.3s, box-shadow 0.3s;
 }

 .info-item:hover {
     transform: translateY(-5px);
     box-shadow: 0 8px 20px rgba(0, 150, 255, 0.4);
     border-color: rgba(79, 195, 247, 0.6);
 }

 .info-label {
     display: flex;
     align-items: center;
     font-size: 1.3rem;
     color: #4fc3f7;
     margin-bottom: 10px;
 }

 .info-label i {
     margin-right: 10px;
     font-size: 1.5rem;
 }

 .info-item p {
     font-size: 1.1rem;
     line-height: 1.6;
     color: #e0f7fa;
 }

 #musicBtn {
     display: block;
     margin: 30px auto;
     padding: 12px 30px;
     background: linear-gradient(to right, #00bcd4, #007bb5);
     border: none;
     border-radius: 30px;
     color: white;
     font-size: 1.1rem;
     cursor: pointer;
     box-shadow: 0 5px 15px rgba(0, 188, 212, 0.4);
     transition: all 0.3s;
 }

 #musicBtn:hover {
     transform: translateY(-3px);
     box-shadow: 0 8px 20px rgba(0, 188, 212, 0.6);
 }

 .trail {
     position: absolute;
     width: 5px;
     background: linear-gradient(to bottom, rgba(255, 152, 0, 1), rgba(255, 152, 0, 0));
     transform-origin: top;
     z-index: 5;
 }

 .pulse {
     position: absolute;
     top: 50%;
     left: 50%;
     width: 20px;
     height: 20px;
     background: rgba(255, 152, 0, 0.7);
     border-radius: 50%;
     transform: translate(-50%, -50%);
     animation: pulse 2s infinite;
     opacity: 0;
 }

 .earth {
     position: absolute;
     bottom: -50px;
     left: 50%;
     width: 400px;
     height: 400px;
     background: radial-gradient(circle at 30% 30%, #1a237e, #0d47a1, #01579b, #006064);
     border-radius: 50%;
     transform: translateX(-50%);
     box-shadow: 0 0 50px rgba(33, 150, 243, 0.6);
     z-index: -1;
 }

 @keyframes fadeIn {
     from {
         opacity: 0;
     }

     to {
         opacity: 1;
     }
 }

 @keyframes fadeInDown {
     from {
         opacity: 0;
         transform: translateY(-50px);
     }

     to {
         opacity: 1;
         transform: translateY(0);
     }
 }

 @keyframes titleGlow {
     0% {
         text-shadow: 0 0 10px rgba(0, 150, 255, 0.5);
     }

     100% {
         text-shadow: 0 0 30px rgba(0, 200, 255, 0.9), 0 0 60px rgba(0, 150, 255, 0.7);
     }
 }

 @keyframes pulse {
     0% {
         transform: translate(-50%, -50%) scale(0.8);
         opacity: 0.7;
     }

     70% {
         transform: translate(-50%, -50%) scale(1.5);
         opacity: 0;
     }

     100% {
         transform: translate(-50%, -50%) scale(2.2);
         opacity: 0;
     }
 }

 @keyframes float {
     0% {
         transform: translate(-50%, -50%) translateY(0);
     }

     50% {
         transform: translate(-50%, -50%) translateY(-15px);
     }

     100% {
         transform: translate(-50%, -50%) translateY(0);
     }
 }

 @media (max-width: 768px) {
     .main-title {
         font-size: 3rem;
     }

     .hint {
         font-size: 1.2rem;
     }

     .countdown {
         font-size: 2.5rem;
     }

     .spaceship-container {
         width: 200px;
         height: 200px;
     }

     .panel-title {
         font-size: 2rem;
     }

     .panel-content {
         flex-direction: column;
     }

     .earth {
         width: 300px;
         height: 300px;
     }
 }